Word 2003 asks for Word 2000 disk 2 (Office 2003 Basic)

The church office computers have a mix of Office 2000 and Office 2003. Some machines have both. Recently one of the secretaries was trying to do a Word 2003 mailmerge using an Excel file provided by another secretary. More than likely the Excel file was 2000. Anyhow, Word complained that it didn't have the conversion utility and would we like it to load the utility. We replied yes and it asked for the Office 2003 disc. We supplied that and it whirred for a while and then it asked for Office 2000 Disc 2. That required some scrambling but we finally came up with one. And it whirred for a while and then asked for Office 2000 Disc 2. So we used the Browse button and it said it was looking for Data2.msi and we pointed it to that and it whirred for a while and then asked for Office 2000 Disc 2.

No further progress from that point. Finally gave up and did mailmerge on an Office 2000 machine.